Grooving device for shoe-sewing machines.



P. E. BECKMAN. GROOVING- DEVICE FOR SHOE SEWING MACHINES. APPLICATIONFILED MAR. 18, 1910.

1,030,767, Patented June 25,1912.

COLUMBIA FLANOGRAPH :0, WASHINGTON, D. C.

TINTTED STATES PATENT OFFICE.

FRANK ELIAS BECKMAN, OF HAVERHILL, MASSACHUSETTS, ASSIGNOR TO UNITEDSHOE MACHINERY COMPANY, OF PATEBSON, NEW-JERSEY, A CORPORATION OF NEWJERSEY.

Specification of Letters Patent.

Patented June 25, 1912.

Application filed March 18, 1910. Serial No. 550,276.

To all whom it may concern Be it known that I, FRANK E. BECKMAN, acitizen of the United States, residing at I-Iaverhill, in the county ofEssex and State of Massachusetts, have invented certain new and usefulImprovements in Grooving Devices for Shoe-Sewing Machines; and I dohereby declare the following to be a full,

clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The present invention relates to an improved grooving device for outsolesewing machines and it is intended primarily for use on work stitchedaloft, that is, on work in which the stitches of the outseam show on thetread surface of the sole although it may be used to advantage on workprovided with a light channel in which case the grooving device will actto form a groove near the inner edge or bottom of the channel.

The object of the present invention is to provide an outsole sewingmachine with a device which will remove a skiving or strip of leatherfrom the tread surface of the sole so as to form a groove to receive thestitches and which will be so constructed and arranged as not tointerfere with the operation of the other parts of the machine and whichwill direct the strip of leather away from the sole in such a mannerthat the strip will not be entangled with the thread or be engaged bythe needle, awl, or other moving parts of the machine.

WVith the above object in view the present invention contemplates theprovision in a sole sewing machine of a grooving knife arranged to actjust in advance of the needle to form a groove in the tread surface ofthe sole to receive the line of stitches, together with means fordirecting the strip of leather removed by the knife away from the soleat an angle to the direction of feed. In the preferred form of theinvent-ion the grooving knife is provided with a suitably shaped cuttingedge to form a groove of the desired shape and is provided with a stripdeflecting surface adjacent the cutting edge. Preferably also the partof the machine upon which the grooving knife is mounted is also providedwith a deflecting surface which, in effect, forms a continuation ofthedeflecting surface on the knife. In the construction hereinafterdescribed as embodying the invention in the best form which has yet beendevised, the grooving knife is mounted upon the presser foot of themachine and the deflecting surfaces of the knife blade and presser footact to direct the strip of leather removed from the sole upwardly andforwardly so that it passes in front of the circular path of movement ofthe needle without any liability of being engaged by the needle or awlor of being entangled with the thread.

The present invention will be clearly understood from an inspection ofthe accompanying drawings in which-- Figure 1 is a view in sideelevation of a portion of a well known outsole sewing machine with thepreferred form of the invention applied thereto. Fig. 2 is a View infront elevation of the parts illustrated in Fig. 1. Fig. 3 shows twoviews of the grooving knife detached from the machine one View being aplan and the other a side elevation. Fig. 4 is a top plan view of thepresser foot and grooving knife. Fig. 5 is a bottom plan view of thepresser foot and grooving knife. Fig. 6 is a view in front elevation ofthe presser foot and grooving knife with the grooving knife and aport-ion of. the presser foot shown in section on a vertical planepassing through the center of the knife edge and Fig. 7 is a detailsectional view of the presser foot and grooving knife taken on the line7-7, Fig. 4.

As illustrated in the drawing, the invention is shown as applied to theoutsole sewing machine disclosed in the patent to French and Meyer, No.473,870, 1 indicating the curved hook needle of the machine, 2 theneedle guide, 3 the awl, 4.- the work support and 5 the presser foot.

The cutting edge of the grooving knife is indicated at 6 and is formedupon a semicylindrical projection 7 of the body of the knife. Thecutting edge of the knife is thus semi-circular in shape and will cut agroove in the tread surface of the shoe sole which is semi-circular incross section. To deflect the strip which is severed from the sole bythe cutting edge of the knife an inclined deflecting surfaoe8 isprovided on the knife which extends upwardly from the cutting blade atan angle of or more to the surface of the sole. Above the deflectingsurface 8 the presser foot 5 is provided with a recess 9, the walls ofwhich form a continuation of the deflecting surface 8 and one of thewalls of the recess 9 is inclined, as in- .dicated in Fig. 7, so thatthe strip of leather severed from the sole is not only directed upwardlyaway from the surface of the sole but also forwardly. The shape and'ar-' rangement of the deflecting surfaces of the knife and presser footare such that the .presser foot by means of a clamping screw 11, thepresser foot being slotted at 12 so as to form a clamp which may beactuated by the screw 11 to clamp the knife in position. By looseningthe screw 11 the grooving knife may be adjusted transversely to thedirection of feed to bring it into the proper position with relation tothe needle.

' a The manner in which the groove is formed in the tread surface of thesole, and the manner in which the strip is removed from the sole, isclearly shown in Figs. 1, 6 and 7, in which 13 indicates the outsole ofa shoe being operated upon and 14: the strip of material which is beingremoved from the sole to form a groove.

The nature and scope of the present invention having been indicated andthe pre- '7 the tread surface of the sole to receive the V stitches, andmeans for directing the strip of leather removed by the knife upwardlyand forwardly outside of the circular path of the needle.

' 2. An outsole shoe sewing machine, having, incombinatio-n, stitchforming devices including a needle, a work support, a presser footarranged to engage the tread surface of the sole, and a grooving knifemounted on the presser foot in advance of the needle in position to forma groove in the tread surface of the sole to receive the stitches, saidknife and presser foot being provided with deflecting surfaces to directthe strip of leather removed by the knife away fro-m the sole at anangle to the direction of feed.

3. An outsole shoe sewing machine, having, in combination, stitchforming devices including'a curved hook needle, a work support, apresser foot arranged to engage the tread surface of the sole, agrooving knife mounted on the presser foot in advance of the needle inposition to form a groove in the tread surface of the soleto receive thestitches, said knife and presser foot being provided with deflectingsurfaces to direct the strip of leather removed by the knife upwardlyand forwardly outside of the circular path of the needle.

FRANK ELIAS BEGKMAN. Vitnesses:

HowAnD R. SHAW, CHESTER E. ROGERS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

